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Finding the Fourth Proportional to 68,603.78, 102,905.67 and 45,060.12

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Solution

The fourth proportional to 68,603.78, 102,905.67 and 45,060.12 is: 67,590.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,603.78 : 102,905.67 = 45,060.12 : x
  2. Step 2: Convert to fraction form
    68,603.78/102,905.67 = 45,060.12/x
  3. Step 3: Cross multiply
    68,603.78x = 102,905.67 × 45,060.12
  4. Step 4: Simplify right side
    68,603.78x = 4,636,941,838.88
  5. Step 5: Solve for x
    x = 4,636,941,838.88/68,603.78
  6. Step 6: Final answer
    x = 67,590.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.